There was a fellow talking to his buddy one day.  The fellow said,  "I don't know what to get my wife for her birthday.  She has everything, and besides, she can afford to buy anything she wants, so I'm stumped."

His buddy said, "I have an idea. Why don't you make up a certificate that says she can have two hours of great sex, any way she wants it. She'll probably be thrilled!"  So, the first fellow did just that.

The next day his buddy asked, "Well, did you take my suggestion? How'd it turn out?"

"She loved it.  She jumped up, thanked me, kissed me on the mouth, and ran out the door yelling,  "I'll see you in two hours!"